DV MARK

[ Active and passive sub woofers; ] active and passive audio speaker enclosures; sound amplifiers; electronic sound mixing, processing and synthesizing apparatus; electronic products for the manipulation of the frequency, time and amplitude characteristics of audio signals, namely, audio processors; pre-amplifiers; audio receivers; electronic effect pedals for use with sound amplifiers; electric wires and cables for the above cited goods; software to control and improve audio equipment sound quality; [ headphones; microphones ]